aspiring iOS researcher & estradiol enthusiast @ @calif_io

Joined September 2014
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Calif
@calif_io10h
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I get the best results when I pretend I’m a TV lawyer. I poke around the code by asking detailed questions to prime the context with model generated facts. These are used for the contract invalidation question “is it ever possible that …” In my head I call it the Matlock method
The weird part about this is that it can be hard to pin down exactly what makes the difference. An expert just chatting with a frontier model will still get better results than someone unfamiliar with the topic!
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Largest credit goes to @lcfr_hax for the earliest recent discovery of the bug class. This underlying engine issue was so wide it invited a lot of parallel discovery. As we coordinated our findings the scope of the problem continued to expand!
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Calif
@calif_ioOct 21
Let’s set the record straight: @lcfr_hax was the first to discover php2shell and develop a working exploit. See his August 5 tweet: xitter.cf/lcfr_hax/status/208503… His work convinced the PHP Foundation to invest in fixing this entire bug class. He then worked around the clock to review, test, and retest the patches.
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Calif
@calif_ioOct 21
php2shell - A tale of two PHP remote vulnerabilities: calif.io/php2shell
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Using an iPhone 18 Pro 27.0 kernel coredump to learn something about sandboxes
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You can see an iPhone get popped and still understand there’s nuance. I think Apple devices are some of the most expensive to attack. Exploiting them doesn’t make other devices more secure. AI is changing the economics but they’re still there. It hasn’t erased the mitigations.
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If you are tired of AI generated analysis of the 0-click CoreGraphics bug fixed in iOS 26.7.1 a few days ago, here is a more authoritative version from our research team. It includes analysis of WhatsApp too so you get 2 for the price of 1. To whoever found this bug: very cool. Please talk to us at @hexacon_fr next month. No PDFs plz.
Calif
@calif_ioSep 30
CVE-2026-86950: The Great Glyph Grift calif.io/research/the-great-…
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0x41con 7 Mad props to Anna and @qwertyoruiopz for hosting and organising this edition! Kudos to all the speakers! And thank you all for being part of it!
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My kinda hot take on the Mythos stuff is really that there is so little money in offensive research that it's still not really that hard to find bugs. These AI companies are operating with budgets that make the entire offensive research of all big tech combined look like a joke
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0x41con 2025 is over!
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We are sincerely thankful to our sponsor that make it possible for the mHACKeroni team to take part in the DEF CON 27 CTF in Las Vegas: mhackeroni.it/sponsors/
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